Development of titanium oxide layer containing nanocrystalline zirconia particles with tetragonal structure: Structural and biological characteristics

Title
Development of titanium oxide layer containing nanocrystalline zirconia particles with tetragonal structure: Structural and biological characteristics
Author(s)
고영건신기룡[신기룡]김연성[김연성]김계원[김계원]신동혁[신동혁]
Keywords
PLASMA ELECTROLYTIC OXIDATION; COMMERCIALLY PURE TITANIUM; APATITE-FORMING ABILITY; MAGNESIUM ALLOY; SURFACE-PROPERTIES; FILMS; COATINGS; BIOACTIVITY; IMPLANTS; HYDROXYAPATITE
Issue Date
201507
Publisher
ELSEVIER SCIENCE BV
Citation
COLLOIDS AND SURFACES B-BIOINTERFACES, v.131, pp.47 - 53
Abstract
This study investigated the microstructural, mechanical and biological properties of oxide layers containing tetragonal zirconia (t-ZrO2) particles on pure titanium produced by plasma electrolytic oxidation (PEO) process. For this purpose, PEO processes were carried out at an AC current density of 200 mA/cm(2) for 180s in potassium pyrophosphate (K4P2O7) electrolytes with and without t-ZrO2 powder. Structural investigations using transmission electron microscopy exhibited that the present nanocrystalline oxide layer evidenced the successful incorporation of a myriad of t-ZrO2 particles working as an intermediate medium to reinforce the adhesion strength between the substrate and oxide layer. Regarding biomimetic apatite formation, the t-ZrO2 particles uniformly spread were of considerable importance in triggering the nucleation and growth of biomimetic apatite on the surface of the oxide layer immersed in a simulated body fluid solution. The growth and proliferation rates of the osteoblasts (MC3T3-E1) cultured on the oxide layer with t-ZrO2 particles were higher than that without t-ZrO2 particles due to the higher roughness providing the better sites for the filopodia extension and interlocking. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/31565http://dx.doi.org/10.1016/j.colsurfb.2015.03.047
ISSN
0927-7765
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공과대학 > 신소재공학부 > Articles
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